<?php

require_once __DIR__ . '/../includes/api_bootstrap.php';
require_once __DIR__ . '/../includes/grocery_helpers.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    sendJson(['success' => false, 'error' => 'Method not allowed'], 405);
}

$people = normalizePeopleList(readJsonFile('people.json'));
requireActivePerson($people);

$body = readJsonBody();
$storeId = isset($body['storeId']) ? trim((string) $body['storeId']) : '';
$itemId = isset($body['itemId']) ? trim((string) $body['itemId']) : '';
$purchased = !empty($body['purchased']);
if ($storeId === '' || $itemId === '') {
    sendJson(['success' => false, 'error' => 'storeId and itemId are required'], 400);
}

$lists = normalizeGroceryLists(readJsonFile('grocery_lists.json'));
$items = $lists['byStore'][$storeId] ?? [];
$idx = null;
foreach ($items as $i => $it) {
    if (($it['id'] ?? '') === $itemId) {
        $idx = $i;
        break;
    }
}
if ($idx === null) {
    sendJson(['success' => false, 'error' => 'Item not found'], 404);
}

$row = $items[$idx];
$catalog = normalizeCatalogList(readJsonFile('grocery_catalog.json'));

if ($purchased) {
    $row['status'] = 'purchased';
    $row['purchasedAt'] = gmdate('c');
    $cid = $row['catalogId'] ?? null;
    if (is_string($cid) && $cid !== '') {
        foreach ($catalog as $ci => $c) {
            if (($c['id'] ?? '') === $cid) {
                $catalog[$ci]['lastPurchaseAt'] = gmdate('c');
                $days = max(0, (int) ($row['recurringIntervalDays'] ?? 0));
                if ($days > 0) {
                    $catalog[$ci]['recurringIntervalDays'] = $days;
                    $catalog[$ci]['nextDueDate'] = gmdate('Y-m-d', strtotime('+' . $days . ' days'));
                }
                break;
            }
        }
    }
} else {
    $row['status'] = 'active';
    $row['purchasedAt'] = null;
}

$row = normalizeGroceryLineItem($row);
$items[$idx] = $row;
$lists['byStore'][$storeId] = $items;

if (!writeJsonFile('grocery_catalog.json', $catalog)) {
    sendJson(['success' => false, 'error' => 'Failed to save catalog'], 500);
}
if (!writeJsonFile('grocery_lists.json', $lists)) {
    sendJson(['success' => false, 'error' => 'Failed to save grocery list'], 500);
}

sendJson(['success' => true]);